Self-centering clamp of double-sided double-station milling and drilling combined machine tool

Abstract

The invention belongs to the technical field of machine tools and provides a self-centering clamp of a double-sided double-station milling and drilling combined machine tool. The self-centering clamp is formed by a hydraulic motor, a clamp body, a left and right rotary guide screw, a left and right rotary nut, nut bases, clamping V-shaped blocks and a coupling; the hydraulic motor is connected with the left and right rotary guide screw through the coupling; the two nuts which rotate around sleeve the left and right rotary guide screw; the two nut bases are fixed on the two nuts respectively; the two clamping V-shaped blocks are fixed on the two nut bases respectively. According to the self-centering clamp of the double-sided double-station milling and drilling combined machine tool, the defects of the existing clamps are completely overcome; the framework of the self-centering clamp is formed by the hydraulic motor, the clamp body, the left and right rotary guide screw, the nut bases, the clamping V-shaped blocks, the coupling and the like; the left and right rotary guide screw is driven by the hydraulic motor through the coupling, the left and right rotary nut base is driven by the guide screw, the two clamping V-shaped blocks are fixed on the nut bases, and accordingly the purpose of clamping workpieces is achieved; otherwise, the looseness of the workpieces is achieved through inversion of the hydraulic motor.

Description

technical field [0001] The invention relates to a clamping device for a machine tool for milling double-end faces and punching center holes in the machining industry. Background technique [0002] At present, the clamping mechanisms used in the market mostly adopt such as figure 1 The linear oil cylinder 1-6 shown drives the active tongs 1-5 and the driven tongs 1-3 to realize self-centering clamping of the workpiece. Figure 1-1 is the fixture frame. [0003] The disadvantages of this fixture are: [0004] 1. The clamping stroke is limited by the stroke of the linear oil cylinder, and the workpiece 1-4 can only be clamped within a very limited range; [0005] 2. The service life is short. As we all know, the equipment for milling and drilling center holes is suitable for processing large quantities of workpieces. During the frequent clamping and loosening process, the rack and gear 1-2 are only worn in a small range, which is easy to cause Rack or gear tooth loss phenome...

AI Technical Summary

Problems solved by technology

[0004] 1. The clamping stroke is limited by the stroke of the linear oil cylinder, and the workpiece 1-4 can only be clamped within a very limited range;

[0005] 2. The service life is short. As we all know, the equipment for milling and drilling center holes is suitable for processing large quantities of workpieces. During the frequent clamping and loosening process, the rack and gear 1-2 are only worn in a small range, which is easy to cause Rack or gear tooth loss phenomenon;

[0006] 3. The positioning accuracy is poor. During the use of the fixture, the rack and gear will wear and tear, resulting in a large gap. At this time, the active pliers are directly driven by the oil cylinder, while the driven pliers are subject to the indirect action of the rack and gear. Realize movement, once there is a gap, the active tongs and driven tongs will be out of sync

Therefore, the center position will shift, and the clamping accuracy will be lost

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